According to Pew, 56% of baby boomers now favor marriage equality, up from a almost even divide on the issue in 2015, when 45% said they were in favor. Most had rejected the idea of allowing same-sex couples to marry by a margin of 48% opposed to 42% in favor. But in the last two years since the U.S. Supreme Court decision requiring states to recognize same-sex marriages nationwide, support has even grown among sections of the U.S. population who previously opposed it in large numbers.

In recent years, a number of groups that have traditionally been against same-sex marriage have shifted their perspectives.

The poll was taken by telephone with 2,504 US adults nationwide and has a margin of error of 2.3 percentage points.